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Python | sympy.genocchi() method

With the help of sympy.genocchi() method, we can find Genocchi numbers in SymPy.

genocchi(n) –

The Genocchi numbers are a sequence of integers Gn that satisfy the relation \frac{2t}{e^t + 1} = \sum_{n=1}^\infty \frac{G_n t^n}{n!}.

Syntax: genocchi(n)

Parameter:
n – It denotes the number upto which genocchi number is to be calculated.

Returns: Returns the nth genocchi number.

Example #1:




# import sympy 
from sympy import * 
  
n = 7
print("Value of n = {}".format(n))
   
# Use sympy.genocchi() method 
nth_genocchi = genocchi(n)  
      
print("Value of nth genocchi number : {}".format(nth_genocchi))  


Output:

Value of n = 7
Value of nth genocchi number : 0

Example #2:




# import sympy 
from sympy import * 
  
n = 10
print("Value of n = {}".format(n))
   
# Use sympy.genocchi() method 
n_genocchi = [genocchi(x) for x in range(1, 11)]  
      
print("N genocchi number are : {}".format(n_genocchi))  


Output:

Value of n = 10
N genocchi numbers are : [1, -1, 0, 1, 0, -3, 0, 17, 0, -155]
Dominic
Dominichttp://wardslaus.com
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